Return-Path: <owner-rsgb_lf_group@blacksheep.org> X-Spam-DCC: paranoid 1481; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u948mfnZ024108 for <sq5bpf@lipkowski.org>; Tue, 4 Oct 2016 10:48:41 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1brLHC-0001ek-7n for rs_out_1@blacksheep.org; Tue, 04 Oct 2016 09:40:38 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1brLH9-0001eb-1p for rsgb_lf_group@blacksheep.org; Tue, 04 Oct 2016 09:40:35 +0100 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from <vlf0403@abelian.org>) id 1brLH6-0007yL-Id for rsgb_lf_group@blacksheep.org; Tue, 04 Oct 2016 09:40:33 +0100 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=hXDrE8K1vaJFWX3iHOlYvYamodf6j9VqRe1rsfg2cVM=; b=BRHKd96roOh5dbe1hzHUBOZzHJ tQaVcEK7It4FKcMkVbppfahIAs0V9PoQ+1gZPXPQAu9MpTYHYlbBK0iX4K+LkRDr11GOGIMjczIXg J5Td6W/vfpqQ+BXOXB7f6LmWdQ3OFXDXTe78DWpvoRvuzj9LeK1uT9eLObvMCvSl0nT8=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:58717 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from <vlf0403@abelian.org>) id 1brLH6-0005bl-4O for rsgb_lf_group@blacksheep.org; Tue, 04 Oct 2016 09:40:32 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 848514000B4 for <rsgb_lf_group@blacksheep.org>; Tue, 4 Oct 2016 08:40:31 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <1578aa0a7a2-3956-7bbf@webprd-m57.mail.aol.com> From: Paul Nicholson <vlf0403@abelian.org> Message-ID: <57F36AFF.9020300@abelian.org> Date: Tue, 4 Oct 2016 08:40:31 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <1578aa0a7a2-3956-7bbf@webprd-m57.mail.aol.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Scan-Signature: 739d4fb39bd02fc5a2de5437a39bb056 Subject: Re: LF: Re: Low QRN on VLF! Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8935 I wondered if that 8270 Hz might be Uwe, the bearing was right but the signal much weaker than normal. Also some other traces of signal at 8270: 2016-09-18_16:50,+1h and maybe 2016-09-13_11:10,+30m, on the same bearing. Stefan wrote: > Also we could try some EbNAut tests again. That would be nice! I just exercised my workstation PC on the 25 char 16K25A message sent by W4DEX on 2015-01-01 00:00. '8822HZ 2015 JAN 1 TA TEST' with Eb/N0 = -0.1 dB At that time I had to use AWS EC2 to decode the message but now it's within the 64Gbyte RAM of my PC. Decodes in 5 minutes using 8 cores (was 2.5 mins on AWS Xeon E5-2680 with 32 cores). So in 2 years, home PCs have moved on somewhat. Today, AWS announced available Xeon E5-2686 v4 with 64 cores and 256 Gbyte RAM so the bar is raised again to allow messages of over 100 chars with the strongest coding. It's been a busy summer here with not much time for radio but I've accumulated a collection of coils, amplifiers, kites, and 250m of very nice ultra light strong antenna wire from sotabeams. Perhaps soon it is time to apply for that NoV but the application asks for quite a lot of detail which is difficult to settle without doing experiments first. Hopefully I can get away with a sufficiently vaguely worded application which leaves room to experiment with different antennas and transmitting locations. -- Paul Nicholson --